Finding the Fourth Proportional to 1,485.40, 2,049.86 and 822.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.40 : 2,049.86 = 822.29 : x
2. Step 2: Convert to fraction form
   1,485.40/2,049.86 = 822.29/x
3. Step 3: Cross multiply
   1,485.40x = 2,049.86 × 822.29
4. Step 4: Simplify right side
   1,485.40x = 1,685,575.27
5. Step 5: Solve for x
   x = 1,685,575.27/1,485.40
6. Step 6: Final answer
   x = 1,134.77